# Orcaflex Modal Analysis With Viv Analysis

> Sub-skill of orcaflex-modal-analysis: With VIV Analysis (+1).

- Skill: `vamseeachanta/orcaflex-modal-analysis-with-viv-analysis` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/orcaflex-modal-analysis-with-viv-analysis`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/orcaflex-modal-analysis-with-viv-analysis/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/orcaflex-modal-analysis-with-viv-analysis

---


# With VIV Analysis (+1)

## With VIV Analysis


```python
# 1. Run modal analysis to get natural frequencies
modal_results = modal.run_modal_analysis(cfg)

# 2. Use frequencies in VIV assessment
from digitalmodel.subsea.viv_analysis.viv_analysis import VIVAnalysis
viv = VIVAnalysis()
viv_results = viv.screen_for_viv(natural_frequencies, current_profile)
```

## With OrcaFlex Post-Processing


```python
# After modal analysis, run dynamic simulation
# and extract time series at modal frequencies
```